S503 - Humidity Calibrator - Save time and money calibrating your RH probes Michell Instruments' S503 Humidity Generator is an affordable, practical and extremely flexible calibration system suitable for any company that uses RH instruments. At 50% less cost than alternative systems currently on the market, it offers a fast return on your investment as well as the freedom to calibrate RH instruments on site. And for this price a mirror reference is included! Results you can trust: The S503 is available with a chilled-mirror reference instrument - making a complete, traceable calibration system that provides reliable results time and time again. No specialist training: The S503 is simple to use without previous experience. If your staff can operate RH instruments, they will also be able to re-calibrate with the S503. Use on-site or in the field: At under 2kg and just 24cm wide, the S503 is compact and easily portable. Complete calibration system for use in the field Used in combination with the Optidew Vision, the S503 becomes a complete, traceable calibration system, which can be used in the field just as conveniently as the S503 on its own. Michell's Optidew Vision, with its precise and drift-free chilled mirror technology acts as a reference instrument for the S503, creating an easily portable and highly reliable system for calibration of humidity instruments. We challenge you to find a more reliable and accurate system for the same or a lower price! Want to know how it Works? Ask for an on-site demonstration of your humidity sensors now! Click here